Adding options for sure, so called port options. They differ depending on which port they were staged at. But that takes only seconds, they just through them in the back. The dealer "installs" them but they are always things like mats and nets. Since the window sticker matches the options, I would guess that the port prints those too, but maybe the dealer prints them.
Seems a bit crazy to add gas before transport given the extra weight and danger of explosion (however small). Dealers can do that.
I think the two weeks of transport is just logistics, not so much port tasks.
2018 Kia LX HEV Metal Stream with Advanced Tech